iCadets dreaming of basings
Gentlemen, the fundamental reason bases even exist within CX is cost-saving: CX spends so much for its HKG-expat housing that basing people around the world becomes the much cheaper option. Basings are a hassle (immigration/taxation/rostering issues etc etc) but worthwhile in order to save on housing costs.
If you accept to join CX in HKG without proper (indexed) expat housing, you have removed the very reason that makes it cost-effective for CX to offer bases.
If you haven't even joined this (Hong Kong-based) airline yet and you're already dreaming of basings, good luck to you... there are hundreds of far more senior FOs and SOs (and Captains!) who have been in the company for years waiting for a base ahead of you. While the company would save plenty of money by basing them, they won't save much by putting you on a base, so guess what? They won't.